Tesco.com was one of the first online grocery retailers and proved online grocery selling can be profitable. It rejected a warehouse model due to low demand and high costs. Instead, it used existing store infrastructure and shopping carts equipped with displays to pick customer orders. Orders were fulfilled through an efficient delivery system that generated fees. Customer data and a loyalty program helped manage inventory and provide personalized service. Consultants helped maintain the website to support different customer needs. Ultimately, Tesco.com's unique store-pick business model allowed it to grow online sales significantly and sustain its online venture.